Goods and Services Tax is one of the most crucial tax reforms in India which has been long pending. Goods and Services Tax to be implemented from 1st April 2017 by Govt. of India.. It is a comprehensive tax system that will subsume all indirect taxes of states and central governments and unified economy into a seamless national market. It is expected to iron out wrinkles of existing indirect tax system and play a vital role in growth of India. The paper highlights the background, Prospectus and challenges in Implementation of Goods and services Tax (GST) in India. It also focused the impact of GST in India and a comparative study of GST with other countries.